I don't how viable of an idea this is, or how many resources for stuff like this are out there, but perhaps a video series on general beginner tutorials on competitive battling would be nice? Not necessarily teambuilding, as plenty of resources for those exist and they're very meta-dependent (and I'm not sure I'm competent enough at this topic that I could potentially talk about it ^^'), but more of some general theory and concepts that can apply to several metagames. Topics could include:
- Basic Pokemon concepts in a competitive light (Status conditions, Permanent stats, temporary stats, the role items and abilities can play, hell maybe even types/type charts)
- EVs/IVs/Natures, how to determine the best ones to use, damage calcing
- General roles of Pokemon (Sweepers, Wallbreakers, Cleaners, Revenge Killers, Hazard support, status support, walls/annoyers, clerics, trappers, speed control, etc.)
- Identifying different types of teams (HO/Offense, Bulky Offense/Balance, Semi-Stall/Stall)
- Making inferences about an opponents team, identifying "how to win", prediction, inferences you can make from calcs, general math/probability involved in CompMons, "what's my best move?", etc.
Basically, the stuff you should know so you don't sound clueless in your first Smogon post and before you apply for tutoring